linux-cve-announce - CVE-2024-53236: xsk: Free skb when TX metadata options are invalid

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2024122738-CVE-2024-53236-0ab4@gregkh>
Date: Fri, 27 Dec 2024 14:53:22 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-53236: xsk: Free skb when TX metadata options are invalid

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

xsk: Free skb when TX metadata options are invalid

When a new skb is allocated for transmitting an xsk descriptor, i.e., for
every non-multibuf descriptor or the first frag of a multibuf descriptor,
but the descriptor is later found to have invalid options set for the TX
metadata, the new skb is never freed. This can leak skbs until the send
buffer is full which makes sending more packets impossible.

Fix this by freeing the skb in the error path if we are currently dealing
with the first frag, i.e., an skb allocated in this iteration of
xsk_build_skb.

The Linux kernel CVE team has assigned CVE-2024-53236 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.8 with commit 48eb03dd26304c24f03bdbb9382e89c8564e71df and fixed in 6.11.11 with commit 7f0d0dd5a7f437d83cff954bc321f1a9b181efd5
	Issue introduced in 6.8 with commit 48eb03dd26304c24f03bdbb9382e89c8564e71df and fixed in 6.12.2 with commit d5d346deb65efa8453f8481bcea75c1a590439e7
	Issue introduced in 6.8 with commit 48eb03dd26304c24f03bdbb9382e89c8564e71df and fixed in 6.13-rc1 with commit 0c0d0f42ffa6ac94cd79893b7ed419c15e1b45de

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2024-53236
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	net/xdp/xsk.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/7f0d0dd5a7f437d83cff954bc321f1a9b181efd5
	https://git.kernel.org/stable/c/d5d346deb65efa8453f8481bcea75c1a590439e7
	https://git.kernel.org/stable/c/0c0d0f42ffa6ac94cd79893b7ed419c15e1b45de